In Meredith Wilson's MUSIC MAN, the professor tried to get Marion the librarian to go out with him. He asked her to meet him at the footbridge across the stream running through the park. She wanted to, but she refused.

She said, "Please, some other time. Maybe tomorrow."

The professor persisted, yet she continued to put off their meeting.

Finally, in exasperation, he said: "Pile up enough tomorrows and you'll find that you've collected nothing but a lot of empty yesterdays."